Using Dissections to Cut and Reshape Rectangles

Date: 08/28/2004 at 08:31:15
From: Marcia
Subject: Mathematical Excursions
Cut a 20x15 piece of paper into two pieces to form a 25x12 piece.
I have tried and tried and tried and my parents have tried also but
we can't figure it out. This may be a trick question but I can't
decide what the trick is. Can you help?